Explicitly Grouping Design Elements With U_SET - 2023.2 English

Vivado Design Suite User Guide: Using Constraints (UG903)

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2023.2 English

U_SET lets you group cells regardless of hierarchy or where they appear in the design. All cells with the same set_name are members of the same RPM set.

Design elements tagged with a U_SET constraint can be primitive or non-primitive symbols.

When attached to non-primitive symbols, the U_SET constraint propagates downward through the hierarchy to all the primitive symbols below it that are assigned RLOC constraints.